... on a fairly large scale 适度规模 practice on a large scale 大规模实践时期 kill on a large scale 杀死许多人 ...
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The effect of irregular root on the growth of sprout and root is little, so walnut seedling grafting could be used in practice on a large scale.
核桃子苗根系的形状对嫁接成活率、苗木生长量和根系的生长发育均无显著影响。
But there are numerous practical difficulties that have prevented the practice from spreading on a large scale.
但具体操作上的大量困难阻碍了这一做法的大范围推广。
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